13Cr Martensitic Stainless (var. 4)

metal

13Cr Martensitic Stainless Steel (variant 4) is a cobalt-strengthened, molybdenum-alloyed martensitic stainless steel designed for ultra-high-strength applications requiring corrosion resistance and wear tolerance. This composition—elevated in cobalt (14.1 wt%), molybdenum (3.73 wt%), and carbon (0.47 wt%)—represents a specialized variant optimized for demanding aerospace, energy, and precision engineering sectors where both static strength and fatigue resistance in corrosive or wear-prone environments are critical. The addition of cobalt and molybdenum over conventional 13Cr grades provides strengthening and enhanced toughness retention, making it particularly suited to applications where standard martensitic stainless steels would be marginal.

aircraft landing gear and fastenersgas turbine compressor bladeshigh-pressure steam valve bodiespump shafts and impellersprecision bearing racesdownhole oil & gas tools

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Elongation at Break(εf)
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-——
Ultimate Tensile Strength(σUTS)
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ksi——
Yield Strength (0.2% offset)(σy)
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ksi——
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Quality & Standards

Industry-Specific

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.